Self-charging mixing and dispensing apparatus



March 1, 1960 E. o. MARTINSON 2,926,796

SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 5Sheets-Sheet 1 Eowm O. MAnTmsoN March 1960 E. o. MARTINSON 2,926,796

SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 5Sheets-Sheet 2 [mm/Wm Eowm O. MARTINSON Afro/ME March 1, 1960 E. o.MARTINSON SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5,1955 5 Sheets-Sheet 3 f/v VE/VTOR Eowm O. MARTINSON March 1, 1960 E. o.MARTINSON 2,926,796

SELFCHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 5Sheets-Sheet 4 Enwm O MARTINSON ATTORNEY. y

March 1, 1960 E. o. MARTINSON 2,926,796

SELF-CHARGING MIXING AND DISPENSING APPARATUS Filed Dec. 5, 1955 A 5Sheets-Sheet 5 hiv Ill llh? [NYE/V701? Enwm O. MARTINSON SELF-CHARGINGMIXING AND DISPENSING APPARATUS Application December 5, 1955, Serial No.550,997

9 Claims. (Cl. 214-2) The present invention relates generally toimprovements in the art of loading, mixing and dispensing batches ofbulk materials, and relates more especially to improvements in theconstruction and operation of mechanism for facilitating the prepartionand dispensing of concrete mixtures, road dressings, and other bulkmaterials.

In the preparation of concrete and similar cement and aggregate mixturesit is desirable that the ingredients be accurately proportioned andthoroughly mixed. While it is a relatively simple matter to produceaccurately proportioned concrete or like mixtures at central batchingand mixing plants from which batches of the product may be successivelytransported to the point ofuse in ready mixed condition, it is notalways desirable to thus handle the product, especially when long haulsare required. In many cases the cost of concrete or other similarmixtures can be reduced and the placing of the mixtures materiallyfacilitated with the aid of portable batching, mixing and dispensingunits mounted upon trucks or other vehicles. Although many previousattempts have been made to provide such mobile units, these priorefi'orts have not been entirely successful either because they failed tomeet the ingredient proportioning requirements, or because they were toocomplicated and cumbersome to manipulate, or because they functioned tooslowly and were not sufiiciently flexible in their adaptations It istherefore an important object of this invention to provide a mobileconcrete or other material mixing apparatus which obviates all of thedifliculties and objections inherent in prior units of this type.

Another important object of the present invention is to providesimplified and effective mechanism for rapidly loading, mixing andunloading successive batches of bulk materials, and which may beconveniently manipulated by a single operator.

A further important object of the invention is to provide a mixing unitcapable of producing properly proportioned batches of concrete or thelike in rapid succession and delivering the same in any desireddirection.

An additional important object of the invention is to provide unitaryconcrete or similar mixing equipment which functions to pick up anddeliver accurately meas ured portions of the ingredients to a mixingreceptable from conveniently located supply piles, to thoroughly mix themeasured ingredients, and to dispense the final product to any desiredlocality.

These and other more specific objects and advantages of the inventionwill be apparent from the following detailed description.

A clear conception of the features constituting the present improvement,and of the construction and operation of preferred embodiments of theinvention, may be had by referring to the drawings accompanying andforming a part of this specification in which like reference charactersdesignate the same or similar parts in the various views.

, Fig. 1 is a rear and side perspective view of a mobile States Patentconcrete mixing and dispensing unit made in accordance with the presentinvention and showing the mixer loading bucket in charging position;

Fig. 2 is a similar perspective view of the same unit but showing themixer tilted to deliver a charge of mixed concrete into the bucket;

Fig. 3 is an enlarged fragmentary side view of the material handlingbucket, showing in detail the bucket operating mechanism and the chargeweighing device;

Fig. 4 is a fragmentary transverse horizontal section through theassemblage of Fig. 3 taken along the irregular line 44, showing themanner in which an hydraulic line is led from the charge weighingdevice;

Fig. 5 is a diagrammatic top view of the mobile concrete batching,mixing and dispensing unit, showing the material handling bucket and themixing receptacle disposed in alinement with the transporting vehicle insolid lines, and swung into alternative loading positions in dotand-dashlines;

Fig. 6 is a diagrammatic view in end elevation of the same mobile mixingunit illustrating the turntable and mixing drum swung transversely ofthe transporting vehicle, and showing the batch transfer bucket about todeliver a charge of concrete into a high form in solid lines, and alsoshowing the bucket delivering a charge into a lower form in dottedlines, both forms being disposed at a side of the vehicle;

Fig. 7 is another diagrammatic view in side elevation of the concretemixing unit illustrating the manner in which the mixing drum is adaptedto spout mixed batches directly into a form disposed rearwardly of thevehicle and without the aid of the transfer bucket;

Fig. 8 is an enlarged fragmentary side view of the turntable portion ofthe concrete mixing unit showing fragments of the vehicle chassis,mixing drum, and inner bucket carrying booms;

Fig. 9 is a further enlarged fragmentary front end view of the mixingdrum and its driving mechanism; and

Fig. 10 is a side elevation of a modified unit embodying a similarturntable and loading bucket, but adapted for use with a batch truckbody of the type commonly used for charging concrete paver machine skipsor the like.

While the invention has been shown and described herein as beingespecially useful for application to mobile concrete batching, mixingand dispensing units, many of the improved features are obviously moregenerally applicable to equipment for treating and handling other bulkmaterials; and it is also contemplated that specific descriptive termsemployed herein be given the broadest possible interpretation consistentwith the disclosure.

Referring to the drawings, the mobile concrete batching, mixing anddispensing plant shown in Figs. 1 to 9 inclusive, comprises in general,a motor vehicle 12 having a chassis 13 mounted on wheels 14; a rotarysupport or turntable 15 mounted upon the vehicle chassis 13; a mixingdrum 16 tiltably mounted upon the turntable 15; and a loading andunloading clamshell bucket 17 carried by outer and inner articulablyinterconnected booms 18, 19 respecitvely, of which the inner booms 19are pivotally mounted upon the turntable 15 independently of the mixingdrum mounting.

The vehicle 12 is driven by means of an internal com-' bustion engineconfined beneath the front hood 21. Power for the mixing, tilting andother functions is provided by means ofan hydraulic pump (not shown)which is operably connected to said engine. If the weight of] thevehicle with its engine is not sufficient to maintain stability underall operating conditions, the vehicle may be provided with outriggers(not shown) in a manner well known to those skilled in the materialshandling art.

Firmly secured to the rear portion of the chassis 13y near therear'drive wheels 14, is a frame 24 having an annular base 25 restingthereon and rigidly attached thereto, and an upright shaft or center pin26 is journalled for rotation centrally within the base 25 and has apinion 27 secured to its lower end. The rotary turntable 15 whichcarries the mixing drum 16 and the material handling bucket 17, issecured to the upper end of the pivot shaft .26 and has three pairs ofupstanding ears 28, 29, 3t? thereon. These ears are providedrespectively with horizontally alined pivots 32, 33, 34. A double actinghydraulic ram 35 which has its cylinder mounted upon the chassis 13 andframe 24, has its reciprocable plunger 35 provided with a rack 37 whichcoacts with the pinion 27, see Fig. 8. The turntable 15 is also providedwith bearing and hook rollers 33 which coact with the upper and lowersurface respectively of the upper flange of the ring base 25.

The rotary material mixing drum 16 may be provided with the usualstraight blading common to tilting type mixers. its front end isprovided with a ring gear 39. its rear end is provided with a chargingand discharging opening 46. it is rotatablysupported upon a U-shapedcradle 41 by roller bearings 42 coacting with a track on its taperedperiphery near the charging opening 49, and by a stub shaft 43projecting centrally from its closed end and coacting with a bearing 44on the cradle 4i. An hydraulic motor and gear box 45 coacts with thering gear 3% for effecting rotation of the drum to. The hydraulic motor35 as well as the hydraulic power units hereinafter to be described areconnected to the hydraulic pump on the vehicle by means of piping (notshown) which is led down through the hollow center pin 26.

Although not shown in the drawings the stub shaft 43 is provided withpassages by means of which water may be introduced into the drum 16 in aWell known manner.

The rearwardly extending opposite side arms 47 of the cradle 41 areswingably cooperable with the alined pair of pivots 32 carried by therear ears 2% of the turntable 15, and the medial portions of the cradlearms 47 are provided with depending lugs 48 which are provided withhorizontally alined pivots 49, as shown in Fig. 8. A double actinghydraulic ram 56 is interposed between each of the pivots 33 carried bythe turntable cars 29 and the pivots 49 mounted on the cradle lugs 48,and the plungers 51 of these rams i) are movable to swing the cradle 41down or up about the pivots 32 so as to position the mixing drum 16either in mixing position as shown in Figs. 1 and 6, or in dischargingposition as depicted in Figs. 2 and 7.

The turntable thus supports the mixing drum 16 for rotation about theturntables own central axis and for tilting fore and aft about thetransverse horizontal axis of the cradle pivots 32. The rotary mixersupport or turntable 15 is also provided with a removable spout 52 forreceiving and guiding the material discharged through the opening 40,and with a loading hopper 53 the outlet opening of which is communicablewith the drum opening 40 when the drum 16 is in loading position. The;spout 52 is detachably secured to the turntable 15 between the rear ears28 thereof, and the loading hopper 53 is carried by this turntablethrough linkage 54 which functions to automatically position the hopperoutlet in communication with the drum opening 40 when the drum 16 istilted forwardly and to retract the hopper 53 to permit free rearwardtilting of the mixing drum.

The loading and unloading clamshell bucket 17 comprises two similarshell sections swingably suspended from a bracket 56 by pivot pins 57,this bracket 56 being swingably suspended from the free swingingextremities of the outer booms 1% by a weighing knuckle member 55 and apivot pin 53, as illustrated in Fig. 3. The-opposite-ends of these outerbooms 18 are articulably connected to the swinging ends of the innerbooms 19 by means of a transverse pivot 59, and the opposite ends of theinner booms are swingably mounted upon the turntable ears 3% by thealined pivots 34. The medial portions of the inner booms 19 are providedwith lugs '66 which have horizontally alined pivots 61 thereon, and asingle acting hydraulic ram 62 is interposed between each of the pivots6i and the pivot 33 carried by the adjacent turntable car 29 forswinging the inner or front booms 1? upwardly and forwardly. The medialportions of the inner and outer booms have pivot pins 63, 64 mounted in.cars formed thereon respectively, and the corresponding pins 63, 64 ofeach pair of arms 18, 19 are interconnected by a double acting hydraulicram 65 adapted to relatively swing these arms about the pivot pin ineither direction, see Figs. 1 and 2.

Each of the shells of the bucket 17 is provided with a pair of levers 67the medial portions of which are fulcrumed upon the adjacent pivots 57and the lower ends or" which pivotally engage cylindrical tubular bracesprojecting inwardly from the opposite bucket side walls, While theirupper ends are swingable toward and away from each other to open andclose the clamshell. A pair of double acting hydraulic rams 65-? havetheir cylinders pivotally attached to alined pins 76 carried by theupper swinging ends of one set of the levers 67, while the ram plungers71 have their outer ends likewise secured to alined pivot pins 72connecting the upper swinging ends of the other set of these levers,whereby outward movement of the ram plungers 71 will close the bucket 17and inward movement of these plungers will close the bucket, see Figs.1, 2 and 3. The bucket 17 is also provided with a charge weighing device73 of the hydraulic piston Bourdon type which coacts with the knucklemember 55 and is operable to transmit motion by fluid pressure throughconduits to a dial 74 located near the operators station.

As beforementioned, the various hydraulic rams 35, 55', 62, d5, 69 andthe motor 45 are all adapted to be operated from a suitable commonsource of hydraulic pressure preferably supplied with liquid underpressure by a pump driven by the vehicle motor, and all of these ramsare controllable by means of manually manipulable valve levers 76mounted upon an operators stand 77 carried by one side of the turntable15, and upon which the charge weight indicating dial 74 and a pressuregauge 78 are also mounted. This common station or stand '77 enables asingle attendant to control and to observe the functioning of the unitregardless of the position of the mixing and handling mechanismsrelative to the vehicle 12. The booms 18 may if desired be provided withdash pots connected between the knuckle 55 and the bracket 56 forabsorbing the inertia of the clamshell bucket 17 when lifting heavybatches of material for delivery into the hopper 53, and the booms 19with shock absorbing springs (not shown) for cushioning their backwardswing.

When the improved mixing apparatus has been mounted upon the motordriven vehicle 12 there is provided a mobile concrete mixing plant whichmay be utilized in numerous ways in the following manner. Referringespecially to the diagram of Fig. 5, here the mixing apparatus has beenpositioned in proximity to a coarse gravel supply pile 8d, a'fine gravelsupply pile $1, a sand supply pile 82, a cement bag supply 83, and awater supply line 84. By manipulating the proper con trol levers 76located at the station 77, the attendant may readily cause turntable 15to revolve and the bucket 17 to swing up or down and along the arcuatepath represented generally by the dot-and-dash line by admitting fluidunder pressure to the various hydraulic rams 35, 62, 65, 69. The detailsof the hydraulic valving and piping have not been shown because giventhe described hydraulic components anyone skilled in the hydraulics artcould connect them into a system for effecting the functions described.

When the material handling bucket 17 has been por sitioned centrallyabove any of the aggregate piles 80, 81, 82 with the aid of thehydraulic rams 62, 65 coacting with the booms 19, 18, the rams 69 may beactuated to open the clamshell and the bucket 17 may be lowered byactuating the rams 62, 65 and subsequently closed with the aid of thesame rams 69 so as to cause a charge of material to be picked up fromthe adjacent pile 80,

81, 82. In order to insure the accurate production of a desired mix,each charge of the aggregate thus picked up by the bucket 17, should becarefully weighed with the aid of the uuid pressure device 73 beforebeing delivered into the rotating drum 16 through the hopper 53 andopening 40 as depicted in Fig. 1 by subsequent actuation of the rams 62,65. If these charges are insuificient more materials should be added,whereas excess materials should be spilled by slightly opening andthereafter reclosing the clamshells. The cement from the bag supply 83may be likewise applied to the hopper 53 and drum 16 in order to producea mixture of desired proportions, and sufficient water should also beadmitted from the supply line 34 at the loading zone so as to 1 providethe desired consistency whereupon the truck 12 may be moved ifnecessary, to where the mixed concrete is to be placed.

' The concrete thus produced may be deposited into diverse types offorms 86, 87, 83 a few of which are illustrated diagrammatically inFigs. 6 and 7, and which may be located either laterally of or inalinement with the vehicle 12. These charges may be delivered from themixing drum 16 either along the short spout 52 into the closed bucket 17as illustrated in Fig. 2, or directly into a form 88 as depicted in Fig.7 along a spout 52 and an extension 89. In either case the turntable maybe revolved by the ram to eflect delivery in the desired. direction,while the rotating mixing drum 16 may be tilted rearwardly anddownwardly by actuating the hydraulic rams 50 coacting with the cradle41. As shown in solid lines in Fig. 6, the bucket 17 after receiving abatch of concrete from the drum 16 and spout 52 may be elevated andmoved by the rams 62, 65 into proper position for delivering thematerial into a high form 86; or the loaded bucket 17 may merely bemoved outwardly away from the vehicle 12 as shown in dotted lines inorder to drop the charge into a low form 87 when the clamshell is openedby actuation of the rams 69. When the mixture is spouted directly into alow form 88 as in Fig. 7, the bucket 17 may be elevated by the rams 62,65 so as to avoid interference with such delivery. The unit mayobviously be employed to effect loading, eflicient mixing, and deliveryof the concrete in any desired direction or at any height within thelimits of movement of the bucket 17.

While the improved mixing apparatus specifically illustrated in Figs.lto 9 inclusive is especially adapted to be used for mixing anddelivering concrete, the turntable 15 and the clamshell actuatingmechanism may also be utilized for handling other bulk material, such asroad making or road dressing substances. In Fig. 10,

' for example, the same turntable 15, bucket 57, and

booms 18, 19 have been mounted upon the chassis 13 of a motor propelledvehicle 12, but the mixing receptacle or drum has been replaced by adump body 90 swingably mounted upon the turntable 15 by a pivot 91 andadapted to be tilted rearwardly by a hydraulic ram 92. This receptacleor body 90 may be provided with a series of compartments segregated bymovable partitions 93, and has an end gate 9d at its pivoted end whileits opposite swinging end is provided with a forwardly inclined shield95. The body 9tlmay thus be loaded with four segregated batches ofmaterial by positioning all of the partitions 93 therein, and eachpartition is also preferably provided with a pivoted shield plate 96 atits upper end adapted to cooperate with the shield 95 and with otherplates 96 so as to form loading hoppers,

When an assemblage such as shown in Fig. 10, the turntable 15 mayberevolved with the aid of the ram 35 and by manipulating the propercontrol lever 76 so as to dispose the body either longitudinally ortransversely of the vehicle chassis 13. The body dumping ram 92 shouldalso be controllable by one of the levers 76 in order to etfect dumpingand return of the body 90. The hydraulic rams 62, 65 for effectingarticulation of the booms 18, 19 and the rams 69 for effecting openingand closing of the clamshell bucket. 17 are also operable as hereinabovedescribed, to cause the bucket to pick up material from assorted supplypiles and to deliver batches thereof into the body compartments bygravity, and when these compartments have been supplied with the batchesthe bucket 17 may be positioned as shown in solid lines in Fig. 6,inorder to clear the body 90for dumping purposes. The shield 95 and theshield plates 96 facilitate gravity loading of the several bodycornpartments withoutspillage, and after the body 90 has been properlyloaded the segregated batches of material confined in the body may beeither successively or simultaneously dumped by tilting the body 90 asshown in dot-and-dash lines, by releasing the end gate 94,-and byremoving the partitions 93 either successively or simultaneously. p

From the foregoing detailed description of the con struction andoperation of the self-charging, mixing and dispensing apparatus. itshould be apparent that the present invention provides a mobile unitwhich is simple and durable in structure and which is also convenientlycontrollable by a single attendant to load a receptacle with accuratelypre-measuredbatches of diverse substances, to mix the materials. if sodesired, and to unload the substances or the mixtures either laterallyor longitudinally of the transporting vehicle. The several hydraulicrams 35, 50, 62, 65, 69, 92 providequick acting means for revolving theturntable 15, for tilting the drum 16 or the body 90 fore and aft, andfor universally moving the clamshell bucket 17 throughout a considerablerange. The attendant when located at the station 77 carried by theturntable 15 or standing on the ground if he so wishes has anunobstructed view of all of the working parts of the unit. 7

The improved material mixing plant is furthermore capable of producingconcrete mixtures of uniform quality, and the delivery of the finalproduct may be efifected either directly with the long spout 52, 89, orwith the aid of the bucket 17. The articulated outer and inner booms 18,19 from which the loading and unloading bucket 17 is suspended enablethis bucket to be disposed considerable distances rearwardly of orlaterally away from either side of the vehicle chassis 13, as Well ashigh above the mixing drum 16 or body 90. The turntable assemblage andthe support therefor may also be applied to or bodily removed from astandard motor vehicle chassis 13, and is constructed to preventpossible tilting of the vehicle 13 even when the bucket 17 and thereceptacles for the materials are heavily loaded. I

Because various modifications within the scope of the appended claimsmay occur to persons skilled in the art, it is not desired to limit thisinvention to the exact details of construction and operation of theapparatus herein specifically shown and described.

I claim:

1.In bulk material handling apparatus, the combination comprising, arotatable support; a bulk material receptacle tiltably mounted on saidsupport for movement between charge and discharge position; a loadingand unloading bucket for said receptacle having separable clamshellparts for effecting loading and unloading of said bucket; articulatedlinkage swingably supporting said bucket on said support for movement toand from charge and discharge positions adjacent said receptacle fordepositing bulk material therein and receiving bulk material therefromrespectively; means for weighing bulk material in said bucketprior todeposit in said receptacle; and means for opening and closing saidbucket parts t'or loading and unloading said bucket, said meansincluding means for progressively spreading and closing said bucketparts for effecting dribbling of excess material from the bucket until apredetermined amount of material is present in said bucket prior todeposit of said material in said receptacle.

2. In bulk material handling apparatus, the combination comprising, avehicle, a turntable carried by said vehicle, a rotary concrete mixingreceptacle tiltably mounted upon said turntable for movement betweencharge and discharge positions, a material transfer bucket for saidreceptacle, articulable linkage swingably carrying said bucket upon saidturntable for movement to and from charge and discharge positionsadjacent said receptacle, and means for emptying the contents or" thebucket into said receptacle when the same are in the charge position andfor discharging the contents of the receptacle into the bucket when thesame are in the discharge po sition.

3. In combination, a mobile support, a turntable mounted upon saidsupport for revolution about an upright axis, a rotatable concretemixing receptacle tiltably mounted upon said turntable for movementbetween charge and discharge positions, a loading and unloading bucketfor said receptacle, outer and inner pivotally interconnected boomsmovably suspending said bucket from said turntable independently of saidreceptacle, a hydraulic ram for revolving said turntable, and otherhydraulic rams for swinging said booms relative to each other andrelative to said turntable for moving said bucket to and from charge anddischarge positions adjacent said receptacle.

4. In bulk material handling apparatus, the combination comprising, aturntable rotatable about a vertical axis, a bulk material receptaclepivotally mounted upon said turntable for movement about a horizontalaxis between charge and discharge positions, said receptacle beingadapted to receive and discharge material by gravity flow into and outof said receptacle when in said positions respectively, a loading andunloading bucket for-said receptacle, a boom having inner and outersections forming an extensible support carrying said bucket for movementto and from a charge position above said receptacle and a receivingposition below said receptacle, szu'd outer boom section being pivotallyconnected at itsopposite end portions to said inner boom section andsaid bucket, respectively, for articulated movement about horizontalaxes, and power actuators for moving said boom sections to swing saidbucket vertically and horizontally relative to said receptacle.

5. A bulk material handling apparatus comprising, in combination, avehicle having a rear platform, a turntable mounted on said platformforrotation about a vertical axis, a receptacle mounted on said turntablefor tilting motion about a horizontal axis between-raised charge andlowered discharge positions, a material handling bucket, an articulatedboom pivotally suspending said material handling bucket on the outer endportion thereof, the inner end portion of said boom being pivotallysupported on said turntable for vertical swing about axis parallel tothe tilting axis of said receptacle, said boom being shaped to swingsaid bucket over said receptacle for charging, under the rear of saidreceptacle for receiving material from said receptacle, and laterallyaway from said receptacle for filling, and emptying said bucket at adistance from said receptacle.

6. In bulk material handling apparatus, the combination comprising, asupporting structure, a table mounted thereon for movement about avertical axis, a single ended concrete mixer mounted on said table forrotation about a substantially horizontal axis and for tilting movementbetween charge and discharge positions, a bucket for containing bulkmaterials, and articulated supporting till means for said bucket mountedon said table, said supporting means including power operated meanspermitting lifting of said bucket and moving of said bucket horizontallyto at least a first position for emptying the contents of said bucketinto said mixer when the latter is in charge position and a secondposition for receiving the contents of said mixer when the latter is indischarge position.

7. In bulk material handling apparatus, the combination comprising avehicle, a turntable on said vehicle, a bulk material receptaclepivotally mounted upon said turntable, said receptacle being tiltableforwardly from a raised charge position to a down discharge position, atransfer bucket for said receptacle, an articulated boom having a pairof arms straddling the receptacle each with an inner and an outer boomsection, said boom being pivotally secured to said turntable at one endof said inner boom sections, the other end of said inner boom sectionsbeing pivotally'connected to one end of said outer boom sections, theother end of said outer boom sections carrying said bucket for movementhorizontally and vertically from a filling position at a distance fromthe turntable to a charge position over the receptacle so that itscontents may be emptied therein when the receptacle is in the raisedcharge positiornand to a forward position below the receptacle so as toreceive the contents of the receptacle when the latter is tiltedforwardly to its discharge position, power means operatively interposedbetween medial portions of said boom sections for actuating saidsections relative to each other about the pivotal connection of theiradjacent ends, and additonal power means operatively associated with andfor rotating said turntable and moving said inner boom sections relativeto said turntable.

8. in bulk material handling apparatus, the combination comprising avehicle, a turntable on said vehicle, a bulk material receptacle mountedupon said support, a transfer bucket for said receptacle, an articulatedboom having a pair of arms straddling the receptacle each with an innerand an outer boom section, said boom being pivotally secured to saidturntable at one end of said inner boom sections, the other end of saidinner boom sections being pivotally connected to one end of said outerboom sections, the other end of said outer boom sections carrying saidbucket for movement horizontally and vertically from a filling positionat a distance from the turntable to a charge position over thereceptacle, said bucket having means for emptying its contents into thereceptacle when in said charge position, means for discharging thecontents of the receptacle into said bucket when the latter is inposition below the receptacle, and power means for operating said boomand for rotating said turntable.

9. In bulk material apparatus, the combination comprising, a supportingstructure; a bulk material receptacle mounted on said supportingstructure for tilting movement between charge and discharge position,said receptacle re ceiving and discharging material by gravity flow; abucket for loading and unloading said receptacle; boom means carryingsaid bucket pivotally mounted on said supporting structure for movingsaid bucket vertically and laterally to and from charge and. dischargepositions adjacent said receptacle; means for emptying the contents ofsaid bucket into the receptacle when the same are in the chargeposition, and means for discharging the contents of said receptacle intothe bucket when the same are in the discharge position.

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